package extend01;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 666
 * Date: 2022-11-15
 * Time: 16:53
 */
public class A {// extend01包中
    private int a;
    int b;
    protected int c;
    public int d;
}
class D{
    final int a=10;
   // a=20;//编译出错
}
